Chalcogen, Mg-O, Phase transitions

• Mg-Nb-O-Pb-Ti
• Ca-Mg-O-Si
• Mg-O-Si
• Al-Ca-Mg-O-Si
• Al-Mg-O-Si
• fusion
• temperature for congruent melting
• phase diagram
• structural transitions
• chalcogen
• alkaline
• transitional
• disordered
• monoclinic
• cubic
• orthorhombic
• trigonal
• tetragonal